Where's the first sign-in text stored?

When a user signs into a Windows 8 machine for the first time, a big UI experience is shown, involving friendly text on a hue-cycling background. Those texts are things like "Installing your apps" and "You can get more apps from the Store". I figured out where most OS texts are stored, but those specific texts are nowhere to be found in any MUI file I could see. I don't think they would be hardcoded in English, so I'm still searching for where they're kept.